PC-BSD 1.11 has been released. Major changes: updated installed ports to current versions as of 6-12-06; updated KDE to 3.5.3 (more than 800 bugs fixed compared to 3.5.2); added additional DRM video drivers to default kernel, 3D/DRI support for Intel 3D, Voodoo, ATI, S3, SiS, Matrox, etc.; and much more. Get it from the download page (update or complete .iso), read the changelog, or read the release notes.

For more information about supported cards look here: http://dri.freedesktop.org/wiki/
My Radeon 9600Pro card works just fine with r300_dri driver. If you not satisfied with default PC-BSD Xorg configuration then you can generate new config file yourself: